Duelist with The Absolute Anti-magic Swords

In the era of grand magic, where magic reigns supreme, a young nobleman named Jin, who possesses a unique power, is also known in the underworld as the "Assassin Noble of Magic Killers." One day, during the execution of a mission, Jin encounters a mysterious "slave lady" named Lynette. Afterward, Jin infiltrates an elite girls' academy with her and ends up teaching his secret sword techniques to the noble young ladies as the only male teacher in the academy!